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TCPDF is a PHP class for generating PDF documents without requiring external extensions. TCPDF Supports UTF-8, Unicode, RTL languages, XHTML, Javascript, digital signatures, barcodes and much more.
IMPORTANT:
This version will be soon marked as deprecated and replaced by a new version currently under development: https://github.com/tecnickcom/tc-lib-pdf
ProofReading Markup Language for transmission of corrections
An XML DTD & schema for a ProofReading Markup Language, and reference implementations, to provide for annotation of printed errors and their correction. PRML will be intended for use by proofreaders, editors, and others in the publishing industry.